EP0602555A3 - Diffusing plate made of opal-like semi transparent glassy material for backlighting lcd. - Google Patents

Diffusing plate made of opal-like semi transparent glassy material for backlighting lcd. Download PDF

Info

Publication number
EP0602555A3
EP0602555A3 EP19930119900 EP93119900A EP0602555A3 EP 0602555 A3 EP0602555 A3 EP 0602555A3 EP 19930119900 EP19930119900 EP 19930119900 EP 93119900 A EP93119900 A EP 93119900A EP 0602555 A3 EP0602555 A3 EP 0602555A3
Authority
EP
European Patent Office
Prior art keywords
opal
plate made
diffusing plate
glassy material
semi transparent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19930119900
Other languages
German (de)
Other versions
EP0602555B1 (en
EP0602555A2 (en
Inventor
Michael Scholz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0602555A2 publication Critical patent/EP0602555A2/en
Publication of EP0602555A3 publication Critical patent/EP0602555A3/en
Application granted granted Critical
Publication of EP0602555B1 publication Critical patent/EP0602555B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements
    • G02F2201/465—Snap -fit
EP93119900A 1992-12-16 1993-12-09 Method of producing a diffusing plate made of opal-like semi transparent glassy material for backlighting LCD Expired - Lifetime EP0602555B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4242580A DE4242580C2 (en) 1992-12-16 1992-12-16 Diffuser made of translucent material
DE4242580 1992-12-16

Publications (3)

Publication Number Publication Date
EP0602555A2 EP0602555A2 (en) 1994-06-22
EP0602555A3 true EP0602555A3 (en) 1994-09-21
EP0602555B1 EP0602555B1 (en) 1998-05-13

Family

ID=6475511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119900A Expired - Lifetime EP0602555B1 (en) 1992-12-16 1993-12-09 Method of producing a diffusing plate made of opal-like semi transparent glassy material for backlighting LCD

Country Status (2)

Country Link
EP (1) EP0602555B1 (en)
DE (2) DE4242580C2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737162B1 (en) * 1995-07-27 1997-10-17 Magneti Marelli France DISPLAY DEVICE, ESPECIALLY FOR DASHBOARDS
DE19905217A1 (en) * 1999-02-09 2000-08-10 Mannesmann Vdo Ag Device for equalizing the illumination of a surface
KR100747523B1 (en) * 2001-06-14 2007-08-08 엘지전자 주식회사 apparatus for displaying three-dimensional image
EP3462226A1 (en) 2017-09-27 2019-04-03 Continental Automotive GmbH Head-up display with transparency mask

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659183A (en) * 1980-03-24 1987-04-21 Seiko Epson Corporation Backlighted liquid crystal display
JPH0262417U (en) * 1988-10-26 1990-05-10
JPH03208205A (en) * 1990-01-11 1991-09-11 Shin Etsu Polymer Co Ltd Lighting device
JPH03269518A (en) * 1990-03-20 1991-12-02 Seiko Epson Corp Structure of light diffusing plate of liquid crystal display device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8711933U1 (en) * 1987-09-03 1987-10-29 Ta Triumph-Adler Ag, 8500 Nuernberg, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659183A (en) * 1980-03-24 1987-04-21 Seiko Epson Corporation Backlighted liquid crystal display
JPH0262417U (en) * 1988-10-26 1990-05-10
JPH03208205A (en) * 1990-01-11 1991-09-11 Shin Etsu Polymer Co Ltd Lighting device
JPH03269518A (en) * 1990-03-20 1991-12-02 Seiko Epson Corp Structure of light diffusing plate of liquid crystal display device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
K.HINATANI: "FLAT FLUORESCENT LAMP FOR LCD BACK LIGHT", CONFERENCE RECORD OF THE 1988 INTERNATIONAL DISPLAY RESEARCH CONFERENCE, October 1988 (1988-10-01), SAN DIEGO,CA, pages 52 - 55 *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 485 (M - 1188) *
PATENT ABSTRACTS OF JAPAN vol. 16, no. 85 (P - 1319) *

Also Published As

Publication number Publication date
EP0602555B1 (en) 1998-05-13
DE4242580A1 (en) 1994-06-23
DE4242580C2 (en) 1999-08-12
DE59308542D1 (en) 1998-06-18
EP0602555A2 (en) 1994-06-22

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